Usage: 4 forms in 4 verses
Form Translated As     In Verse(s)
συνεμίγη mixed together LXX.Ezra.9.2
συνέμιξαν mix together LXX.Exod.14.20
συμμιγήσονται they shall be mixed together LXX.Dan.11.6
συμμίξη he mixes LXX.Prov.11.15

Liddell-Scott-Jones

συμμίγνυμι (summignumi) to mix together with G:V

συμμίγνυμι

(frequently written συμμιγ- in codices), [Refs 5th c.BC+]; more rarely συμμειγνύω, [Refs 5th c.BC+], imperfect [Refs]; imperative συμμείγνυ [Refs 5th c.BC+]; Epic dialect and Ionic dialect present συμμίσγω, as always in [Refs 8th c.BC+], sometimes in Attic dialect [Refs 5th c.BC+]: future -μ[ε]ίξω [Refs 5th c.BC+]aorist συνέμειξα until [Refs 3rd c.BC+], and sometimes later, [Refs 3rd c.BC+] and frequently falsa lectio in codices, as of [Refs 5th c.BC+]: perfect -μέμῐχα[Refs 3rd c.BC+]:—middle, future -μ[ε]ίξομαι, in passive sense, [Refs 6th c.BC+]:—mix together, commingle; the active first in [Refs], though the passive occurs in [Refs 8th c.BC+]; of two things, both in accusative, συμμίσγων μυρίκας καὶ μυρσινοειδέας ὄζους [Refs]; βοὰν αὐλῶν ἐπέων τε θέσιν συμμ[ε]ῖξαι [Refs 5th c.BC+]; πῶς κεδνὰ τοῖς κακοῖσι συμμ[ε]ίξ; [Refs 5th c.BC+]; or with accusative only, ὀργὴν συμμίσγων mixing in, adding, [Refs 6th c.BC+]; συμμ[ε]ίξαντες τὰ στρατόπεδα having combined them, [Refs 5th c.BC+]:—rarely in middle, χρώματα συμμ[ε]ίξασθαι [Refs 2nd c.AD+] —passive, with future middle (see. above), to be commingled, γε Πηνειῷ συμμίσγεται [Refs 8th c.BC+] τινι or πρὸς ἄλληλα, [Refs 5th c.BC+]; join forces, of two armies, [Refs 5th c.BC+]; to be formed by combination, opposed to διακρίνομαι, [Refs 5th c.BC+]; ἐξ ἀμφοῖν συμμ[ε]ιχθείς [Refs 5th c.BC+]: metaphorically, εἶναι οὐδένα τῷ κακὸν οὐ συνεμ[ε]ίχθη there is none who has not misery as an ingredient in his fate, [Refs 5th c.BC+]; συμμιγέντων τούτων πάντων when all these things happened together, [Refs 5th c.BC+]

__2 unite sexually, couple, θεοὺς γυναιξί [Refs]; λέχος τινὶ σ. [Refs 5th c.BC+]:—passive, συμμ[ε]ιχθῆναι γυναικί [Refs 5th c.BC+]; Ἔρως ξυνέμ[ε]ιξεν ξυμμ[ε]ιγνυμένων δ᾽ ἑτέρων ἑτέροις γένετ᾽ οὐρανός [Refs 5th c.BC+]
__3 middle and passive, associate with persons, [Refs 5th c.BC+]; ἀνοσίοισι συμμιγεὶς.. ἀνδράσιν mixed up, connected with ungodly men, [Refs 4th c.BC+]
__4 metaphorically, τινὰ εὐθαλεῖ τύχᾳ introduce him to, make him acquainted with high fortune, [Refs 5th c.BC+]; χρῆμα δὲ συμμ[ε]ίξῃς μηδενί communicate it not to any one, [Refs 6th c.BC+]; κοινόν τι πρῆγμα συμμ[ε]ῖξαί τινι communicate to one a subject of common interest, [Refs 5th c.BC+]; σ. συμβόλαια form mutual contracts, [Refs 5th c.BC+]
__II intransitive in active, in sense like the passive, have dealings or intercourse with, associate or communicate with, κακοῖσι, ἀγαθοῖς, [Refs 6th c.BC+]; σ. πρός τινα join him, [Refs 5th c.BC+]: generally, meet for conversation or traffic, [Refs 5th c.BC+]; σ. τινί talk or converse with, [Refs 5th c.BC+]; Ἱέραξ παρὰ σοῦ συμμείξας “BGU” l.with; of ambassadors interviewing kings, [Refs]
__II.2 of sexual intercourse, [Refs 5th c.BC+]
__II.3 in hostile sense, meet in close fight, come to blows, engage, τινι with one, [Refs 5th c.BC+]; of ships, [Refs 5th c.BC+] (συμμείξειν) πόλεμόν θ᾽ ἅμα [Refs]
__II.4 generally, meet, τοῖς ἄλλοις εἰς λιμένα [Refs 5th c.BC+]; θάλατται πρὸς ἀλλήλας σ. [Refs 4th c.BC+]